Elecraft

wattmeter calibration

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WA8EBM

wattmeter calibration

Same here with the wattmeter calibration. Using a new Array Solutions PowerMaster w/ 5% accuracy and when I get down to 30 on the calibration it is still just under 5 watts or around 45-50 watts. Same whether on dummy load or perfectly matched antenna. And-yes I have done the transmitter gain calibration.
Mike WA8EBM
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Stewart Baker

Re: wattmeter calibration

Using 3 different pieces of test equipment to measure the RF
output power, together with a precision dummy load VSWR <1.02, I
am unable to get more than 44W out at a requested level of 50W.
WMTR setting is flat out at 30. At 120W I get 106W out.

Raised this with Support and Wayne and they are looking into it.

Also the gain calibration routine in the manual is very sparse and
confusing.

73
Stewart G3RXQ
On Sun, 16 Mar 2008 10:45:14 -0400, Mike Penkas wrote:
> Same here with the wattmeter calibration. Using a new Array
Solutions PowerMaster w/
> 5% accuracy and when I get down to 30 on the calibration it is
still just under 5 watts
> or around 45-50 watts. Same whether on dummy load or perfectly
matched antenna. And-

> yes I have done the transmitter gain calibration.
> Mike WA8EBM
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
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> Elecraft web page: http://www.elecraft.com

n6wg

Re: wattmeter calibration

Hi Stewart
Just out of curiousity, what is the supply voltage
to your K3 at the K3?
73, Bob N6WG

----- Original Message -----
From: "Stewart Baker" <[hidden email]>
To: "Mike Penkas" <[hidden email]>; <[hidden email]>
Sent: Sunday, March 16, 2008 7:18 AM
Subject: Re: [Elecraft] wattmeter calibration

Using 3 different pieces of test equipment to measure the RF
output power, together with a precision dummy load VSWR <1.02, I
am unable to get more than 44W out at a requested level of 50W.
WMTR setting is flat out at 30. At 120W I get 106W out.

Raised this with Support and Wayne and they are looking into it.

Also the gain calibration routine in the manual is very sparse and
confusing.

73
Stewart G3RXQ
On Sun, 16 Mar 2008 10:45:14 -0400, Mike Penkas wrote:
> Same here with the wattmeter calibration. Using a new Array
Solutions PowerMaster w/
> 5% accuracy and when I get down to 30 on the calibration it is
still just under 5 watts
> or around 45-50 watts. Same whether on dummy load or perfectly
matched antenna. And-

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

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Elecraft web page: http://www.elecraft.com
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Stewart Baker

Re: wattmeter calibration

On receive 13.7V drops to 13.2V @ 50W.

73
Stewart G3RXQ
On Sun, 16 Mar 2008 09:10:59 -0800, Robert Tellefsen wrote:
> Hi Stewart
> Just out of curiousity, what is the supply voltage
> to your K3 at the K3?
> 73, Bob N6WG
>
> ----- Original Message -----
> From: "Stewart Baker" <[hidden email]>
> To: "Mike Penkas" <[hidden email]>
<[hidden email]>

> Sent: Sunday, March 16, 2008 7:18 AM
> Subject: Re: [Elecraft] wattmeter calibration
>
>
> Using 3 different pieces of test equipment to measure the RF
> output power, together with a precision dummy load VSWR <1.02, I
> am unable to get more than 44W out at a requested level of 50W.
> WMTR setting is flat out at 30. At 120W I get 106W out.
>
> Raised this with Support and Wayne and they are looking into it.
>
> Also the gain calibration routine in the manual is very sparse

and

> confusing.
>
> 73
> Stewart G3RXQ
> On Sun, 16 Mar 2008 10:45:14 -0400, Mike Penkas wrote:
>> Same here with the wattmeter calibration. Using a new Array
> Solutions PowerMaster w/
>> 5% accuracy and when I get down to 30 on the calibration it is
> still just under 5 watts
>> or around 45-50 watts. Same whether on dummy load or perfectly
> matched antenna. And-
>> yes I have done the transmitter gain calibration.
>> Mike WA8EBM
>> _______________________________________________
>> Elecraft mailing list
>> Post to: [hidden email]
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>> http://mailman.qth.net/mailman/listinfo/elecraft
>>
>> Help: http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com